The Cobalt Power Gravel Cleaner is the ultimate cleaning tool for your aquarium. Hang-on tanks style housing operates just like your power filter, but with a cleaning tube, intake nozzle and a reusable cartridge/collecting bag. Completely sealed and self priming, motor runs without leaks or spills and allows the entire unit to be cleaned without harming the electrical components, making cleaning your power gravel cleaner easy and safe.